I currently have only a small amount of Greek learning and most of it is Homeric Greek with a little bit of Attic from reading the New Testament.
Modern Greek is classified as a "Level IV" language by the Foreign Service Institute, meaning that they estimate an English speaker will require about 1100 hours of training to become fluent, which is about 30 weeks of full-time work.
I am wondering if going through this training will help significantly with learning classical and Attic Greek. My understanding is that reading Attic Greek is like Shakespeare is to English speakers, but classical Greek is more like Chaucer. If my target languages are fluent understanding of Attic and Classical, will spending 1100 hours on modern conversational Greek significantly help with that?